Drawing rollers of spinning, doubling, twisting and like machines



May 7, 1929. A RHODES ET AL DRAWING ROLLERS OF SPINNING, DOUBLINEI,TWISTING AND LIKE MACHINES Filed Aug. 16, 1927 3 Sheets-Sheet y 7, 1929-A. RHODES ET AL 1,711,808

DRAWING ROLLERS OF SPINNING, DOUBLING, TWISTING, AND LIKE MACHINES FiledAug. 16, 1927 3 Sheets-Sheet 2 May 7, 1929. RHODES ET AL 1,711,808

DRAWING ROLLERS OF SPINNING DOUBL ING, TWISTING, AND LIKE MACHINES FiledAug 1927 3 Sheets-Sheet 3 Patented May 7, 1929.

warren STATES PATENT OFFICE.

ARTHUR RHODES AND CLEFFORD RHODES, OF KEIGI-ILEY, ENGLAND.

DRAWING RGLLERS OF SPINNING, DOUBLING, TWISTING- AND LIKE MACHINES.

Application filed. August 16, 1927, Serial No. 213,304, and in GreatBritain August 17, 1926.

In the spinning of fibrous substances, especially those of long fibersas wool, mohair and the like, the drawing rollers of the spinning,doubling, twisting and like machines are to be adjusted at varieddistances apartfrom each other to meet the requirements of longer orshorter fibers. In order to carry such fibers during the attenuation ofthe threads, rotary rollers known as .carrier rollers are mountedbetween the back pair of drawing rollers and front pair of drawingrollers. i

In order to transmit rotary motion to the carrier rollers, gear trainshave usually-been employed, capable of adjustment to the clifferentpositions which these rollers must occupy. These gear trains and theprotecting guards necesary therefor, usually occupy so much space abovethe rollers as to obstruct the operators view of the machine partsadjacent to the gear train.

The object of the present invention is to provide a mechanism which willtransmit the desired rotary motion to the carrier rollers and permittheir adjustment as occasion may demand without encountering theobjection hereinbefore given. Briefly stated, this is accomplished byemploying as the transmission mechanism, endless flexible gearorsprocket driving members, such as an endless fiexible rack or achain,.so arranged and supported that the desired rotary motion istransmitted to the rollers.

lVith these and other objects in view, our invention may best beunderstood by the fol lowing description, in conjunction with theaccompanying drawings, wherein Fig. 1 is a left side elevation of theupper part of a machine embodying the present invention, with the usualdriving gears shown diagrammatically or by broken lines so as to showtheir connection to the shaft of the front drawing roller.

Fig. 2 is a plan view of the parts shown in Fig. 1.

Fig. 3 and Fig. 4 are views similar to Figures 1 and 2, respectively,but taken looking at the right hand side'of the machine.

Fig. 5 and Fig. 6 are detail views of the transmission n'iechanisin,with some parts broken away for clearness.

Fig. 7 and Fig. 8 are views similar to Figures 5 and 6, respectively,but showing a modified form of transmission mechanism.

Fig. 9 and Fig. 10 are elevation and plan views, respectively, of partsshown in Figures 5 and 6, drawn to a larger scale.

Referring to the drawings, A indicates a side frame of the usualspinning and twistmg machme, B the shaft of the front drawing rollers,and C the shaft of the back drawing rollers. In accordance with thepresent invention, the usual gear train, which comprises gears ofcomparatively large diameter to drive the carrier rollers from the backroller, is dispensed with. In place of this train of gears, we employ anendless flexible rack 2, which as best shown in Fig. 5, is made up ofcomparatively short sections-linked together by pivots Pv and havingteeth 2 extending from one edge thereof. These teeth conform in shapewith the teeth of the usual gear-racks, so that they may be meshed withthe teeth of the usual gears. One of these endless racks is provided ateach side of the machine and is arranged to drive one or more carrierrollers. One of the endless racks (see Figures 1 and 2) is driven by agear 3 of the shaft C of the back roll from the shaft B of the frontroll, which derives its motion from a suitable source of power (notshown). Wotion is transmitted to the back roll by a gear trainconsisting of a gear 8 fixed to the shaft B and meshing with a gear 9 onone end of a shaft 9 to the other end of which is fixed a gear 10meshing with a gear 11 on the shaft C. The rack 2 meshes with a. gear 3fixed on the shaft 7 of one of the carrier r lls.

The endless rack on the other side of the machine (see Figures and l) isarranged to drive the other carrierv rt'illcrs. To this end, a gear 3 isfixed to the shaft C and meshes with a gear a fixed to a stud shaft amounted in an adjustable bearing bracket fixed to the frame A. A gear afixed to the shaft 0, meshes with a'gear a mounted on a studshaft acarried by the bracket an. The gear a. meshes with the rack 20, which inturn meshes with gears 3" and 3, respectively fixed on the shafts and 40of the other carrier rolls.

The endless flexible racks are guided in fixed paths so as to meshproperly with the various gears as hereinbefore described, and are somounted as to be adjusted in accordance with the size of the gears 3 and8 on opposite ends of the shaft. To this end, as best shown in Figures 5and G, the rack 2 is

